The overall market moved marginally lower for the week -- the S&P 500 lost 0.76% and Nasdaq was down 2.39% -- while AMEX Oil was 0.40% lower from the previous week.

CELS -- down 3.96% for the week and 9.53% higher than a year ago - tracks U.S.-listed clean-energy companies and is divided into four categories: advanced materials; energy intelligence; energy storage and conversion; and renewable electricity generation and renewable fuels. Of the 51 total component securities, 12 experienced gains, 38 lost ground, and one remained unchanged.

QWND -- 0.35% higher last week and 30.31% lower in the last 12 months - includes companies that are primarily manufacturers, developers, distributors, installers, and users of energy derived from wind sources. Of QWND's 18 pure play components, seven saw gains, 10 experienced losses, and one ended the week unchanged.

Shares of Ener1 (Nasdaq:HEV) were gapping down Wednesday morning with an open price 19.2% lower than Tuesday's closing price. The stock closed at 26 cents yesterday and opened today's trading at 21 cents.